don't let 'anyone' be a reviewer

Bug: 1120999
Change-Id: I8190a9d37f8dfcb59d9d51966fc67719592c2c8a
R=sokcevic@google.com
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/2378453
Reviewed-by: Josip Sokcevic <sokcevic@google.com>
Commit-Queue: Anthony Polito <apolito@google.com>

owners.py

@@ -82,6 +82,9 @@ BASIC_EMAIL_REGEXP = r'^[\w\-\+\%\.]+\@[\w\-\+\%\.]+$'
 # pathname.
 GLOBAL_STATUS = '*'
 
+# Returned if there is no owner and anyone +1
+ANYONE='<anyone>'
+
 
 def _assert_is_collection(obj):
   assert not isinstance(obj, str)
@@ -184,7 +187,7 @@ class Database(object):
       if len(suggested_owners) > 1:
         suggested_owners.remove(EVERYONE)
       else:
-        suggested_owners = set(['<anyone>'])
+        suggested_owners = set([ANYONE])
     return suggested_owners
 
   def files_not_covered_by(self, files, reviewers):

split_cl.py

@@ -126,7 +126,9 @@ def UploadCl(refactor_branch, refactor_branch_upstream, directory, files,
     git.run('commit', '-F', tmp_file)
 
   # Upload a CL.
-  upload_args = ['-f', '-r', ','.join(reviewers)]
+  upload_args = ['-f']
+  if reviewers:
+    upload_args.extend(['-r', ','.join(reviewers)])
   if cq_dry_run:
     upload_args.append('--cq-dry-run')
   if not comment:
@@ -245,7 +247,7 @@ def SplitCl(description_file, comment_file, changelist, cmd_upload, dry_run,
       directory = directory.replace(os.path.sep, '/')
       file_paths = [f for _, f in files]
       reviewers = owners_database.reviewers_for(file_paths, author)
-
+      reviewers.discard(owners.ANYONE)
       if dry_run:
         PrintClInfo(cl_index, num_cls, directory, file_paths, description,
                     reviewers)